Hinowa LightLift 15.70 3S, Technical Course Booklet

Page: 57 / 137

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8.4.2 DRIVE GEAR MOTORS
Each drive gear motors runs forward or backward independently, it’s so possible
to turn the machine. Drive gear motors are controlled by the ground
valveblocks and each one is equipped with an automatic brake that is
hydraulically deactivated only while it runs.
On the machine equipped with “second speed”, drive gear motors are equipped
with a second speed system, indeed they are variable capacity so that they can
perform two different hydraulic speeds in order to change tracks speeds further
that rpm regulation.
The second speed block contains the coil in charge to activate the second speed,
selecting HARE from remote control button the control module will energize
that coil.
When that coil is energized oil is sent to both drive gear motors to move their
plate so that their chamber capacity will be reduce.
With reduced capacity the gear rate is increased so that the tracks speed is
increased too.
SECOND SPEED
VALVE COIL
SECOND SPEED
PRESSURE GAUGE
AUTO2SPEED
PRESSURE
CALIBRATION
PLUG